Sony HDW-F500 Maintenance Manual page 178

4-4. Alternative Maintenance Menu
4-4-1. SERVO SYSTEM Adjustment
[F5] (RF SW MANUAL) Key :
Performs manual adjustment of RF switching position.
This adjustment is used when automatic adjustment ([F6]
RF SW AUTO) is impossible to perform because of some
reason.
n
Adjustment value of the field frequency differ 59.94i/60i
from 50i, moreover 23.976PsF/24PsF.
Be ensure to perform adjustment on each modes.
Besides, had better perform either of 59.94i or 60i and
either of 23.976PsF or 24PsF.
Before starting this adjustment, cue up the alignment tape
HR2-1A to the portion on which only A ch. is recorded
from the tape top where CTL counter starts count-up
operation.
n
If a cassette tape is loaded to the unit when selected this
menu, the cassette tape is automatically ejected from the
unit. The adjustment starts by loading the cassette tape to
the unit again.
(1) Connect CH-1 probe of an oscilloscope to CN106-
42 pin [REC|AC] on EQ-85 board.
(2) Connect CH-4 probe to TP1105 [PG|REF] on SS-88
board.
(3) Press [F5] key from ALT+SERVO ADJUST menu to
enter to RF SWITCHING POS. (MANUAL) menu.
(4) Set the alignment tape HR2-1A to the unit. The unit
automatically enters to PLAY mode. During the
process of adjustment, message ADJUSTING....
continues to appear on the display.
n
Be ensure to use the alignment tape HR2-1A.
(5) Press S1000 [REEL|POS] switch on SS-88 board and
check that D1011 [VR|ON] lights.
(6) Turn RV1000 [TRACON] on SS-88 board so that B
becomes the maximum amplitude.
(Refer to the illustration below.)
4-62
N V R A M
C T L
SE T
T E N S N
H R2-1A ALI GNME NT T APE
O F F S E T
C A P S T N
S P E E D
R F S W R F S W
M A N U A L A U T O
(7) Use and keys to change the adjustment data so
that A meets the specification.
(Refer to the illustration below.)
B
Specification : A = 0 ± 2 [usec]
+ keys : Adjusts the data by +100H.
+ keys : Adjusts the data by _100H.
: Adjusts the data by +1H.
key only
key only : Adjusts the data by _1H.
(8) Repeat steps (6) and (7) above until both A and B meet
the specification.
(9) To end the adjustment, press [F1] (NVRAM CTL)
key or [F10] (EXIT) key.
The alignment tape is automatically ejected.
Besides, use the EX-579/580 extension board for
measurement CN106-42 pin on EQ-85 board.
CH.COND AL T+SV ADJ
T CR 0 0:00 :00: 03
ALT SER VO AD JUST
RF SWIT CHING POS .(MA N UAL)
E X I T
[REC|AC]
EQ-85 board
CN106-42 pin
A
[PG|REF]
SS-88 board
TP1105
HDW-F500E MMP1